Machine for wrapping rolls

ABSTRACT

A MACHINE FOR WRAPPING ROLLS OF, FOR EXAMPLE, PAPER IN A WRAPPER, ROTATABLY SUPPORTS EACH ROLL WITH PORTIONS OF THE WRAPPER EXTENDING FROM END OF THE ROLL AND FOLDING MEANS ROTATING ABOUT AN AXIS AT RIGHT ANGLES TO THE AXIS OF THE ROLL ENGAGE AND FOLD THE WRAPPER EXTENDING PORTIONS   AGAINST THE END OF THE ROLL AFTER WHICH A FLATTENING MEMBER FLATTENS SAID FOLDS.

Septl 20, 1971 a. ANDERSSON 3,605,382

mcnmn FOR WRAPPING ROLLS Filed May 6, 1959 s Sheets-Sheet 1 INVENTOR 52M ANDERSSfl/V ATTORNEYS P 20, 1971 E. ANDERSSON 3,605,382

MACHINE FOR WRAPPING ROLLS Filed May 6, 1969 3 Sheets-Sheet 2 INVENTOR ERIK QNDER SS0 ATTORNEYS E. ANDERSSON MACHINE FOR WRAPPING ROLLS 3 Sheets-$heet :5

INVENTOR ERIK ANDERSSO/V BY Ark-M ATTORNEYS Sept. 20, 1971 Filed May 6, 1969 FIG.

United States Patent 3,605,382 MACHINE FOR WRAPPING ROLLS Erik Andersson, 666 00 Bengtsfors, Sweden Filed May 6, 1969, Ser. No. 822,111 Int. Cl. B65b 7/10 U.S. Cl. 53-380 3 Claims ABSTRACT OF THE DISCLOSURE A machine for wrapping rolls of, for example, paper in a wrapper, rotatably supports each roll with portions of the wrapper extending from end of the roll and folding means rotating about an axis at right angles to the axis of the roll engage and fold the wrapper extending portions against the end of the roll after which a flattening member flattens said folds.

The present invention relates to machines for wrapping rolls of paper and the like.

The machine according to the invention is characterized by the combination of at least two rotatable rollers for supporting the paper rolls, and folding means which are movable in the longitudinal direction of said rollers between an operative position adjacent the ends of a paper roll placed upon said table and provided with a wrapper having portions projecting outside the ends of said roll and being folded by said folding means against the ends of the paper roll, and an inoperative position removed from the ends of the paper roll.

The machine according to the invention will be described herebelow with reference to the accompanying drawings, wherein FIG. 1 is an end view of a machine according to the invention during the folding operation, FIG. 2 is a side view of the end portion shown in FIG. 1, FIG. 3 is a view from above of said end portion, FIG. 4 illustrates a detail of the machine and FIG. 5 is a cross section through a further detail of the machine.

In the drawings, numeral 1 indicates a roll of paper or the like which is to be wrapped and the wrapping paper is indicated at 2. Numeral 3 indicates two rotatable rollers on which the paper roll 1 is supported during the wrapping operation. The rollers 3 extend between two walls 4 in which the rollers are rotatably journalled by means of shafts 5. The walls 4 are mounted in such a manner in a frame 6 sunk into a pit 38 that they may be swung about the rotational axis 7 of one of the rollers 3 by means of a jack 8 which extends between the bottom of the pit 38 and a beam 9 extending between the walls 4 at the upper edges thereof. A U-shaped beam 10 likewise extend between the walls 4 and has its ends attached thereto. A carriage 11 is displaceable along the beam 10. The carriage 11 supports means for folding the wrapping paper against the end of the paper roll. These means comprise a wheel-like carrier 13 driven by a motor 12 and carrying a number of folding elements \14 which during rotation of the carrier 13 are moved into contact with the end of the roll 1 and fold the wrapping paper projecting outside the ends of the roll 1 in a direction towards the center of the paper roll 1, and a rotatable roller 15 which is provided behind said folding elements, as seen in the direction of rotation of the roll 1, and which is movable against the end of the roll 1 for flattening the folds formed between the flaps of the wrapping paper folded up towards the end of the roll 1. The machine is provided with similar folding means at the opposite end of the roll 1.

The carriage 11 is provided with'wheels 16 arranged on opposite sides of the beam and guided by means of rails 17 provided on the sides of the beam 10. Movement of the carriage 11 is obtained by means of a jack indicated 3,605,382 Patented Sept. 20, 1971 at 18 in FIG. 2 and extending horizontally between the carriage and attachement 19 which is movable in the longitudinal direction of the beam 10 and which may be clamped in position on the beam. The direction of rotation of the carrier 13 is indicated by an arrow in FIG. 2. A reduction gear 20 shown in FIG. 3 is provided between the driving motor 12 and the carrier 13. The outgoing shaft of the reduction gear is indicated at 21. The carrier 13 with the folding elements 14 are shown in greater detail in FIG. 4. For the sake of clarity only one of the folding elements 14 is shown and certain portions of the carrier are broken away. The folding element 114 is pivoted on a shaft 22 provided at one end of an arm 23 which has its other end pivotally connected to a shaft 24 mounted on the carrier 13. The shafts 212' and 24 are directed in parallel with the rotational axis 21 .of the carrier. In the unloaded position of the folding element 14 illustrated in FIG. 4 the folding element is mainta'med by means of a spring 25 in the position shown in which it has been swung counter clock-wise against an abutment 26 which is carried by the arm 23. The direction of rotation of the carrier is indicated by an arrow. In this unloaded position the leading edge 14a (as seenin the direction of rotation of the carrier 13) of the folding element 14 is disposed nearer to the rotational axis 21 of the carrier than the lagging edge 14b of the folding element. The folding element 14 is in the form of a convex blade curved in two directions. In the unloaded condition of the folding element 14- the arm 23 will be maintained by the compression spring 27 in the position shown in FIG. 4 in which it abuts against a projection 28 on the carrier. When the folding element 14 is brought into contact with the paper roll 1 the folding element will be swung in clock-wise direction according to FIG. 4 against the action of the draw spring 25 towards a second abutment 29 provided on the arm 23, whereupon the folding element 14 together with the arm 23 will be swung clock-wise around the shaft '24 against the action of the compression spring 27. The abutments 24, 26 and 29 are provided with impact-cushioning pads of rubber or the like.

FIG. 5 shows a portion of the flattening roller 15 drawn to a larger scale. This roller is divided into a number of separate elements 31 which are rotatable around a shaft 30. The elements 31 are journalled on the shaft 30 each by means of a roller bearing 32 and are maintained by means of spaced sleeves 33 at such a distance from one another that they may individually rotate freely. The shaft 30 has its ends secured to a fork-like holder 35 by means of nuts 34. As will appear from FIG. 3 the holder 35 may be clamped to one end of an intermediate shaft 36 the other end of which may be clamped to one end of a carrier arm 37 the opposite end of which is secured to the frame 39 arranged on the carrier and supporting the motor. The frame supporting the motor comprises two parts which may be swung relative to one another in a vertical plane parallel to the longitudinal direction of the rollers 3 around a point 40.

Folding of the end of the wrapping paper by means of the above described arrangement takes place as follows. Prior to the folding operation the wrapping paper 2 has been wrapped around the roll 1 with portions of the wrapping paper projecting past the ends of the roll. The roll i1 is supported on the rotatable rollers 3 and the carriages 11 with the folding means are in the position removed from the ends of roll. By rotating the rollers 3 the roll 1 is caused to rotate as indicated by the arrows in FIG. 1, and the carriage 11 are moved by means of the jack 18 towards the ends .of the roll 1 for moving the folding elements I14 against the roll ends. The folding elements 14 and their arms 23 are then swung rearwardly in the manner described hereinbefore each folding element folding a portion of the wrapping paper towards the end surface of the roll 1, the folds formed between such portions being flattened by means of the roller 15. After completion of the folding operation the carriages 11 are moved away from the ends of roll 1 by means of the jack 18. The roll 1 is then caused to roll off from the rollers 3 by raising the jack 8 which will cause the walls 4 to swing in clock-wise direction according to FIG. 1 around the axis 7.

The invention is not limited to the embodiment which has been described hereinbefore and shown in the drawings as an example only, said embodiment being capable of modifications with respect to its details within the scope of the appended claims.

I claim:

1. A machine for wrapping rolls comprising at least two rotatably supported rollers capable of supporting a roll to be wrapped having a wrapper on the roll with portions of the wrapper extending beyond the ends of the roll, a carrier, means rotatably supporting said carrier for rotation around an axis extending at right angles to the axis of the roll and slideable for moving said carrier towards and from an end of the roll, a plurality of folding elements carried by said carrier in positions for engaging said wrapper extending portions and folding said portions towards the end of the roll, a flattening member connected to said supporting means and positioned for flattening the folds formed in the wrapper by said folding elements, each of said folding elements being pivotally connected to said carrier for movement in a direction towards the axis of rotation of said carrier, resilient means tending to retain each fold-ing member from said carrier axis and means for rotatably driving said carrier.

2. A machine for wrapping rolls as claimed in claim 1 including a plurality of shafts carried by said carrier, a plurality of angular arms each pivotally mounted at one end on one of said shafts and having said resilient means bearing thereagainst, each of said folding elements being pivotally connected to the other end of one of said arms in a position such that during the folding of the wrapper each folding element will pivot, simultaneous ly with the pivoting of its angular arm towards said carrier axis.

3. A machine for wrapping rolls as claimed in claim 2 including a plurality of abutments each carried by one of said angular arms, further resilient means tending to pivot each folding element toward the abutment on its arm, further abutments each carried by one of said angular arms and positioned for engaging the folding element pivots upon engaging the wrapper, and the relative spring rates of both resilient means being such that each folding element when engaging the wrapper will first pivot from its first abutment to its second abutment and then its angular arm will pivot towards the axis of said carrier.

References Cited UNITED STATES PATENTS 2,643,499 6/1953 Gerlach 53380X 3,330,095 7/1967 Sandberg 53-380 FOREIGN PATENTS 176,024 7/ 1961 Sweden. 978,671 12/1964 Great Britain.

TRAVIS S. MCGEHEE, Primary Examiner E. F. DESMOND, Assistant Examiner 

